Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
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Status: STD 2005/06/07
Code: 1536

Concept definition: The greatest distance in a given <DIRECTION> at which it is just possible to see and identify with the unaided eye either: (1) in the daytime, a prominent dark <OBJECT> against the sky at the horizon or (2) at night, a known, preferably unfocused, moderately intense <LIGHT>; visibility distance.
Attribute value type: REAL
Unit equivalence class label: LENGTH
Reference type: IR
Reference: [GMET, "visibility"]
Supplemental references:  

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